Combined typewriting and computing machine



c. B. conm.

COMBINED TYPEWRIATAING AND COMPUTING MACHINE.

' APPLICATION min Ara. 74. Isls.

1 ,359,231.. Patented Nov. 16, 1920.

l2 sains-shin x.

C. B. CONELI.v

COMBINED TYPEWRITINC AND COMPUTING MACHINE.

APPLICATION FILED APR. I'. 1919.

Patented Nov. 16, 1920.

2 SMEEJ'S-SHEET 2.

' shaft to operative position, and to release UNITED STATES PATENT OFFECE.

CLIFTON B. CORELL, NEW YORK, N. Y.. ASSIGNOR TO UNDERWOOD COMPUTING MACHINE COMPANY, 0F NEWV YORK, N. Y., A CORPORATION OF NEW YORK.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Application led April 7. 1919.

To all 'whom t may concern:

Be it known that I, CLIr'roN B. CoRnLL, a citizen of the United States, residing in New York cit in the county of New York and State o'f` ew York, have invented certain near and useful Improvements in Combined Typewriting and Computing Machines, of vvhich`thefollowingr is a specifcation.

This invention relates to combined type- Writing and computing machines, and is herein illustrated as applied to a machine of the Underwood-Hanson type.

Heretofore, in combined typewriting and computing-machines adapted to be set for addition or subtraction, provision has been made of ribbon-controlling' means, whereby numbers to be added are printed in one color', and numbers to be subtracted in another color. Obviously, all numbers on the carbon copies are of the same color, and it is desirable to provide means whereby the numbers added and those subtracted may be readily distinguished on the carbon copies.

An object of my invention is to provide an improved means whereby printingr of a symbol may be effected, to enable determination, upon inspection of the Work-sheet or carbon copies, of the state for which the machine was set at the time the number was printed.

In the embodiment of the invention herein disclosed, provision is made of a special type-bar, having thereon a type adapted to print a minus sign. This special type-bar is fixed on a longitudinally-slidable shaft. and, under the control ot said shatt` is moved to and from a position to enable printing of a minus sign, just to the left of the printing point of the key-actuated type-bars. lWhen said shaft is positioned to enable printing of the minus sign at the proper point, any of the key-actuated typebars, when actuated to print, will strike an arm fixed on said shaft and effect a concomitant movement of said special type-bar. Change from a setting for addition to one for subtraction Will cause the actuation of a positioning device adapted to move said thesame when actuated by a key-actuated type-bar.V It will be seen that said. positioning device will continue in ineffective condition until the computingv mechanism has Specication of Letters Patent.

Patented Nov. 1,6, 1920. A

Serial No. 288,212.

been set for addition and then reset for subtraction.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a diagrammatic,.side elevation, partly in section, showing. the invention applied to a combined typewriting and computing machine of the Underwood-Harison type. 4 ,y

Fig. 2 is a fragmentary, perspective view,` showing. some of `the parts in dot-and-'da'sh lines. y l f Fig. 3 is a plan view of the subtraction type-bar and other parts associated therewith, showingthe subtraction type-bar in. its normal position.

Fig. 4 is a plan vievv,shovvin;ir the subtraction type-bar in the position assumed at the end of its actuation by a key-actuated type-bar.

Fig. 5 is a front elevation of certain parts,` in position to enable actuation of the special type-bar by a key-actuated type-bar.

Fig. 6 is a front elevation, showing Vcertain parts in the position assumed after actuation by the key-actuated type-bar and before the setting slide has been restored to normal position.

Alphabet keys l and numeral keys 2, when actuated, willact, through their keylevers- 3, to move bell-cranks 4, and thereby swing type-bars 5 upwardly and rearwardlv against platen 6, mounted on carriage 7. Said carriage is supported for sliding movein one direction by a spring drum and strap (not shown). Movement of thecarriage is controlled by means of the usual escapement mechanism, comprising a rack 10, pivotally mounted on ,the carriage, engaginga pinion 11 having the usual one-Way connection with escapement wheel 12, the movement of which is controlled by the usual fast and loose dogs 13 and 14. Upon actuation of any type-bar 5, a heel 15 thereon will strike a universal frame 16, when .the typebar is near the end of its stroke, and actuate the fast and loose dogs in the usual manner.

To enable control of thecomputing mechanism by means of the numeral keys 2, said keys are provided with pendent links 17. Upon depression of any of said numeral keys,l the corresponding link 17 will strike a lever 18, mounted on one of a set of shafts "wheels 24.

' The denpminatidiiselecting lmeans coinprisesv bars' 25, mounted for jiivotalimovement on a rod* 26iix'ehd on the"earriage,and adjusted Ialongfsaid 'rod 26"by ineans'of teeth 27V o n4 said bars 25 engaging inI suitable' notches fin'la rod 231 fzlt''will be 'seen thatbars 25 *are apablebf swinging to a position below,Y that shown ,in Figyl, and thatftbebarifs held in ifgisedfpisitin by means o'fwa; rollen 3Q v'roller' 29'.

Tiie'-m11er 3o" rs aff the usan-tripa, with conical y ends,V ladaptedto iaisfe the bar;

into active po iti'on'rwhen;"theI carriagfe'is passies' threiishl Qiipilffinsapne. adj'said roller 30 is mountedii'l'r arms' 311.1 fAs, thev carriage Passes. ,thIIOvsh-.a ,Sommige zone. tappets 32 on one 'off' .sai'cl'gbasf 25, will exert a cumming action' .on j acks" 33,' pivoted 'at' 34, and this motion Vwill; be transmitted by I means 'ofplinks 35Llevers ''and transposition n well-known manner.

linkages( l to n bell-cranks" 88, Said bellcranks 38A engage wi,th,pins` BS on radii;i barsA lroyision is,V madeq'for Vsetting''t-rfiefindeiring. mechanism forrsubtractionand such-'set-A tnamay.be Qbtled, by means' 50i e Subwllicfh, when depressed,`w1l 1 act vthrong link,l ands an arm j '42, mounted on'sliaft 43, to withdraw afhooked1 nigh ,44 from, a .net tl' Yip the summation-bar' 45,and permitsaid'bar` 45 'tobe drawn to the 46, icomiected'one' eltoajln on said bar 45;, aad, wie einem@ Leaf tion of the frame, "Suclipijerward movement of tliefsubtraction bar 45Twill serve -to swing an arm 47,conn ected1thereto`by a ,1nand-slot connection, and'therebyrqck Vs aft 48, which,A in turn, is connected'bylarmsAQ and V50, having;V a 'pin-and-s'lot connection therebetween. toa lsetting plate 51, pivoted near. its upper edge, and engaging at its lower edge in notches formed in shafts 19. Tlxe movement'ofI said plate. 51 will be effective to move said sl1aftsj-19` toward 4the front ofthe machineandchan'ie the connect'on between arms 20'andi`linkages` 21 in Subtraction-setting may also be obtained vthis purpose,

lied por'-Y by means. controlled by the carriage. For a threermed lever l52 is mounted on shaft 48, so that clockwise movement ot lever52 about shaft 43 will serve to rock said shaft, and thereby release the subtraction bar, and so that clockwise rocking of said shaft 43 may beeifected without movement of' said three-armed lever 52. A sprin 53, connected to the upright arm of said ever 52 and .to a-xed part o the frame, tends yto give said .lever a movementjn a-clockwise direction. Such movement, however, 4is=-normally prevented by means of a 'latchx54--, normally Vunderl ing the rearwardlyeextendingrarn. of sai Vthreearmed rlever 452` saidlatch 54 comprises' stops suitably positioned on a rack bar on the typewriter carriage, a lever 56, actuated by certain of said Stopsyand 'a linkt?,- through. which motion of leverr willbe'transmitted to afbail?57, to which said1latchf54 l"isi connected..

The-mecbanismirthus; far Y ,lis ,:l ose,df is' of the smegeneralform asthat shown yinthe patent td Minton,uNo.1,280,065, datedSept'emberi 24 1918. .v

The'l embodiment-of the invention herein disclosed comprises a ls ecialftypeban, iixe'd` at the 'uppe endo ashaft 61, 'sli-dably mounted-in a sleeve 62 and provided with a collar 63, 4which, "in `connection f with. said sleeve 62, limits the downward movement.`

of the shaft. -Said yshaft is also .provided with an arm 64, fixed thereon, and normally lying in a'recess, formed lin the rear-of type-bar1 guide 66. As shown in Fig. .5, arm 64 liesbetween the ribbon guide'andthe type-bar-guide, and the recess in the latter enables'the arm to be held normally in such a position as not to interfere with tbeaction of the ribbon guide. .An arm 67 is .also fixed on said shaft 61, at its lower end, and is provided with a downwardly-extending 'pin 68, vthrou h which the vertical position of the shaft 1s controlled'. A spring69, secured, to afixedportion of the frame, engages arm 67 and urges the same downwardly, and in, a direction to `maintain arm 64 in contact with the face of the recessy 65 in the type-bar guide. f Y

' Said pin 68 normally rests on a slide 70, havin a cam projection 71 thereon. Said slide 0 is also providedZ with a pin 72, en-

aging in a slot in one arm of a bell-crank ever 73,A connected at its other end with link 74, ivoted'to an arm 75, Secured to shaft 48.

pon setting for Subtraction either by manual operation or automaticaily, link.74 will be thrust upwardly andslide 70 drawn to the right, as seen in Fig. 2. Such movement ofthe slide will bring cam projection 71 under pin 68 and raise shaft 61, and consequently'arm 64 to a position to be struck The means for controlling by a blade portion 76, near theV head-of an actuated type-bar. Striking of arm 64 by a blade 76 will cause the special type-bar to be swung against the platen, and pin 68 to be thrown to the rear of slide 70, as shown in Fig. 6, thus permitting pin 68 to drop back of slide 70. It will be seen that the special type-bar actuating means becomes ineffective after the actuation of the iirst key-actuated type-bar. This ineffective condition will be maintained until the computing mechanism is set for addition and slide 70 moved to the left, as seen in Fig. 2, to enable pin 68 to be again drawn forward above the upper surface of slide 70.

Variations may be resorted to within the scope of the invention, and portions oi' the improvements may be used without others.

Having thus described my invention, I` Claim Y l. In a combined typewriting and computing machine, the combination with numeral keys and numeral-key-actuated typebars, of computing mechanism settable for different states, a special type-bar to indicate a setting for one oi' said states, and numeral-key-actuated means for actuating said special type-bar, rendered effective by a change to the state indicated by said special typ-bar, and rendered ineffective upon actuation by the first numeral key actuated.

2. In a combined typewriting and computing machine, the combination with numeral keys and numeral-key-actuated typebars, of computing mechanism normally set for addition, means for setting the same for subtraction, a special type-bar to indicate a subtracation-settingL and actuating means rendered eiective by setting for subtraction, whereby actuation of a numeral key will effect actuation of said special type-bar` and release said actuating means from said subtraction-setting means.

3. In a combined typewriting and com puting machine, the combination with nu merel keys and numeral-key-actuated typebars, of computing mechanism normally set for addition, means for setting the same for subtraction, aspecial type-bar to indicate a subtraction setting, actuating means rendered effective by the setting for subtraction, whereby actuation of a numeral key will effect actuation of said special type-bar, and release said actuating means from said subtraction-setting means, and means whereby said computing mechanism may be restcred to a setting for addition, and said actuating means concomitantly restored to the control of said subtraction-setting means.

4. The combination with a platen, keys including numeral keys and numeral-key-aetuated type-bars, oi a special type-bar, a slidably-mounted shaft to which said special type-bar is fixed, an actuating arm mounted on said shaft, means urging said shaft in the direction of its length, and in a direction about its axis to hold its actuating arm in forward position, means to limit the move ment of said shaft due to such urging, and means to move said shai't longitudinally, to bring said special type-bar to the vicinity of its printing point, and said actuating arm into position to be struck and actuated by any oi' said numeral-key-actuated type-bars when actuated.

5. ln a combined typewriting and coinputing machine, the combination with numeral keys, numeral-key-actuated type-bars and a type-bar guide, of computing mechanisrn normally set for addition, subtractionsetting means, a special type-bar to indicate a subtraction-setting, a vertically slidable shaft on which said special type-bar is secured, and actuating arm tixedon said shai't. so that -its forward position is limited by said type-bar-guide, a controlling arm fixed on the lower end of said shaft, and having a downward projection, means to limit the downward movement of said shaft, spring means tending to move said shaft downwardly and to turn the same to a position with said actuating arm in engagement with said type-bar-guide, a slide on which said downward projection normally rests, having an upwardly extending cam projection. and means actuated by said subtraction-set ting means to move said slide suiiiciently to bring said camlprojection under said downward projection, and thereby raise said shai't sufficiently to bring said actuating arm into position to be actuated by a numeral-key-actuated type-bar, such actuation causing said downward projection to ride off and engage behind said cam projection.

6. The combination with typewriting mechanism including a traveling carriage'. keys and key-actuated type'bars, of computing mechanism, carriage-actuated means for determining computing zones, carriage-actuated means for setting said computing mechanism for subtraction upon entering a computing zone, a device normaliy ineffective for printing a subtraction-symbol, and means rendered eifective upon subtractionsetting, to enable actuation of said printing device by one of said keys, and rendered ineffective upon actuation of said printing device by the iirst of said keys actuated after a subtraction-setting.

The combination with a platen, of keys, key-actuated type-bars. a special typebar, means for actuating said special typebar including an actuating member constantly urged to a normal ineiective posi tion. and positioning means for said member including an arm and a; cam for engaging said arm and moving said member to effective position, whereby an actuated typebar will actuate said member and thereby the special type-bar, and carry said arm oil' said cam and permit said member to move to inelective position.

n. The combination with a platen, of keys, Key-actuated type-bars, a special type-bar, a shaft on which said special type-bar is mounted and by which it is actuated, an actuating arm mounted on said shaft, a controlling arm also mounted on said shaft, means urging said actuating arm forwardly and downwardly to a limiting normal position, and positioning means for said actuating arm including a cam for engaging said controlling arm and thereby raising said actuating arm to position to be struck by an actuated type-bar, whereby the special typebar will be actuated and the controlling arm moved oil' said cam and permitted to move to en ineffective position.

9. The combination with a platen, of keys. key-actuated type-bars, a special type-bar, a shaft on which said special type-bar is mounted and by which it is actuated, an actuating arm mounted on said shaft, means urging said arm forwardly and downwardly lo a limiting normal position, a controlling arm mounted on said shaft, positioning means for said actuating arm including a cam for engaging said controlling arm and thereby raising said actuating arm to position to be struck by an actuated typebar whereby the special type-bar will be actuated and the controlling arm moved off said cam and permitted to move to an ineffective position with a part thereof behind said cam, and restoring means for actuating said positioning means to restore said cam to normal position and permit said controlling arm to return to normal position.

l0. The combination with a platen, of keys, key-actuated type-bars. a special type bar, means for actuating said special typebar including an actuating member constantly urged to a normal ineffective po sition, andipositioning means for said member including an arm and a positioning member for engaging said arm and there by moving said actuating member to a position whereby an actuated type-bar will strike the same and thereby actuate the special type-bar and carry said actuating member off the positioning member and permit said actuating member to move to an inei fective position,

ll. The combination with a platen, of' keys. key-actuated type-bars, a special typebar, means for actuating said special typebar including an actuating member conr stantly urged to normal inellectivc position and positioning means for said member Lincluding a controlling member and a positioning member for engaging said controlling member and moving said actuating member to effective position, said controlling member and said positioning member having cooperating means thereon whereby movement of said positioning member will effect oper-fative positioning of said actuating member,

and actuation of said actuating member by a typefbar will enable a movement of said actuating member to an ineffective position.

l2. ln a combined typewriting and computing machine, the combination with a traveling carriage, keys, including numeral keys, and keV-actuated means for effecting a step-by-step trL vcling movement of said carriage, of numeral key-controlled computing mechanism normally set for addition, but settable for subtraction, means to set said mechanism for subtraction, and numeralkeV-actuated means, inei'lefi'tive when said computing ,mechanism is set for addition, out rendered effective upon setting for sub traction for printing a mark indicative of subtraction, said murieral-keyactl1ated meansbcing again rendered iuefi'eetivc upon the first actuation thereof'.

13. ln a combined typewritiug and com puting machine, the combination with a platen, of mechanism for printing one character at a time, Comprising numeral keys and numeralkey-actuated type-bars, normally ineffective means for printing amark indicative of subtraction, computing meclianism normally effective for addition, subtraction setting means, and controlling means rendered effective by said subtractionsetting means to enable actuation of said subtraction-mark printing means by the first numeral key actuated, to print a digit and cause. said controlling means to become ineffective for actuation by numeral keys operated to print other digits of the same number.

'14. The combination with a platen, of keys. key-actuated type-bars mounted to bave a single printing point, a special typebar. a member operatively connected to said special type-bar, and a device for positioning said member to be struck by a key-actuated typebar and to be actuated. to cause a printing movement of said special type-bar, and for permitting said member to more to ineffective position upon completion of such actuation.

ln a t'ombincd typewriting and computing machine, the combination with means. including a t 1aveling carriage, for determining computing zones, of a platen, numeral keys. numoral-key-actuated typebars. numeral-lney -controlled computing mechanism. a device adapted to bc actuated by an actuated type-bar to cause a subtraction mark to be printed, but normally out of the paths of the type-bars, cam mechas nism for moving said device into position to be actuated by the type-bars and for per# mitting movement of the same to ine'eetive position at the end of such actuation by the typebar printing the first digit of the num ber, and carriage-actuated means for controlling said eam mechanism.

1G. The combination with a platen, keys and key-actuated type-bars, of a special type-bar, a member operatively connected with said special type-bar, means whereby said member is normally held out of the paths of the key-actuated type-bars, and means for positioning said member to be struck and actuated by an operated typebar, said positioning means being rendered ineffective by the key-actuated type-bar first actuated.

17. The combination with typewriting` mechanism, including a traveling carriage, keys, including numeral keys, and keynotuated type-bars, ot computing mechanism, comprising indexing mechanism, carriageactuated means for determining computing zones, and rendering said keys effective to index a number in said indexing mechanism, means to set said indexing mechanism fior complementary subtraction, a special type-bar provided 'with a subtraction-indieatingtype, and means rendered effective by said subtraction-setting` means, to enable actuation of said special type-bar by any of said key-actuated type-bars, but rendered ineffective by the first of said key-actuated type-bars to be actuated.

18. In a combined typeivriting and eomputing1 machine, the combination with a platen, keys, including numeral keys, and key-actuated type-bars to cooperate With said platen, et :i type-bar carrying a typeindicatingr subtraction, numeral-key-controlled computing mechanism normally set for addition, means to set said computing mechanism for subtraction, and controlling means rendered effective by said subtraction-setting means to enable any of said keyactuated type-bars to actuate said subtraction-indicating type-bar and render said controlling means ineffective.

19. In a combined typewriting and computing machine, the combination with a platen, numeral keys, and numeral-key-aetuated type-bars, of a special type-bar carrying a subtraction-indicating type, numeralkey-actuated computing mechanism, sub-- traction-setting4 means, and controlling means rendered effective by said subtraction-setting means, whereby, after actuation of said subtraction setting means, operation of a numeral key will effect movement of its typo-bar to operative position and concomitant movement of the subtraction-indicating' type to operative position, and subsequent actuation of a numeral key Will be ineffective to efiect movement of sa id subtraction-indicating type until the computing mechanism has been set for addition and set a second time for subtraction.

Q0. In a combined typewritingir and computing machine, the combination with a traveling; carriage, numeral keys and nu mei'aLkey-actuated type-bars, of computing mechanism settable for different states, a special typebar to indicate a setting for one ot said states, carriage-controlled means for setting;r said computing mechanism to the state indicated by said special type-bar, and numeralkey-actuated means for actuating said special type-bar, rendered effective by said carriage-controlled means, and rendered ineffective by the first numeral key actuated.

Q. The combination with a platen, keys :and key-actuated type-bars, of a special typebar, means including a shaft for actuating said special type-bar, means includingr an actuating member for actuatingr said shaft, and means for positioning said member te be struck and actuated by the first type-bar actuated.

CLIFTON B. CORELL. Witnesses:

EDITH B. LIBBEY,

JENNIE P. THoRNE. 

